"This project applied adaptive digital beamforming to an indoor setting of multiple transmitting devices at the same frequency. A carrier frequency of 2.4 GHz was chosen to correspond with Bluetooth specifications, as it was desired to theorize multiple Bluetooth devices transmitting on an office desktop. Background material for Wiener filter theory and the Least-Mean-Square algorithm were discussed with their relevance to digital beamforming. Linear, solid planar, and hollow planar antenna arrays were examined and the resultant beamformer outputs were compared. The linear array contained 8 antenna elements, while the planar configurations consisted of an 8-by-8 array of elements. An antenna array of roughly 25 cm2 was chosen to represent the size of a standard computer monitor, on which the array was theoretically mounted. Results from preliminary testing show that interfering signals can be attenuated at levels up to 59 dB for the linear and solid planar antenna array patterns. The hollow planar array was not able to place a null directly in the direction of the interfering signal; thus, it could attenuate an interfering signal only by 27 dB. Further testing would show whether or not this was an inherent limitation based on the spacing of array elements"--Abstract, page iii.
Kosbar, Kurt Louis
Cox, Norman R.
Hilgers, Michael Gene
Electrical and Computer Engineering
M.S. in Electrical Engineering
University of Missouri--Rolla
vii, 35 pages
© 2001 Timothy Nicholas Koehler, All rights reserved.
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Koehler, Timothy Nicholas, "Digital beamforming in an indoor setting using solid and hollow planar antenna element arrays" (2001). Masters Theses. 2011.
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